The connecting rod bolt is one of the most highly stressed fasteners in your diesel engine, responsible for securely clamping the connecting rod cap to the rod itself, transmitting the immense forces of combustion without stretching or failing. The 612630020214 Connecting Rod Bolt from HOWO is engineered to deliver exceptional tensile strength, precise clamp load retention, and a perfect factory fit, ensuring that your engine’s rotating assembly operates with the reliability and safety demanded by modern heavy-duty applications. As a critical Howo/Sitrak truck parts component, this connecting rod bolt is manufactured from premium micro-alloyed steel with precision-rolled threads and a specialized heat treatment process, providing outstanding resistance to fatigue, yielding, and corrosion. Whether you are performing a full engine rebuild or replacing worn bolts, the 612630020214 guarantees factory-original clamping force, consistent torque retention, and extended engine life – making it the trusted choice for professional workshops and fleet operators worldwide.
The connecting rod bolt is the silent guardian of your engine’s rotating assembly, withstanding the extreme tensile forces generated during combustion and the high cyclical loads of engine operation. The 612630020214 is specifically designed to provide the exact clamp load required to keep the connecting rod cap securely fastened to the rod, maintaining the proper bearing clearance and preventing catastrophic failure. A stretched, fatigued, or improperly torqued connecting rod bolt can lead to bearing failure, rod cap separation, and complete engine destruction. HOWO has engineered this bolt with a micro-alloyed steel composition that achieves a tensile strength of 1200 MPa, combined with a precision-rolled thread that eliminates stress risers and ensures consistent torque-to-yield performance. The bolt’s controlled elongation characteristics guarantee that it maintains its clamping force over the life of the engine, even under the most extreme conditions. With the 612630020214, you restore the original integrity of your engine’s rotating assembly, protecting your investment and ensuring reliable performance for thousands of operating hours.
Ultimate Strength
1200 MPa
Fatigue Resistant
Heat-Treated
OEM Fit
Exact Match
Precision Clamp
Torque-to-Yield
The 612630020214 connecting rod bolt is manufactured to the highest OEM standards, incorporating advanced materials and precision engineering. Below are the complete technical specifications for this essential engine fastener.
| Parameter | Specification | Detail |
|---|---|---|
| OEM Number | 612630020214 | Exact Match |
| Part Name | Connecting Rod Bolt | HOWO Genuine |
| Brand | HOWO | Original Equipment |
| Application | HOWO T7H / A7 / MC11/MC13 | Connecting rod fastening |
| Material | Micro-alloyed steel (42CrMo4) | Heat-treated |
| Thread Size | M12 x 1.25 | Precision rolled |
| Overall Length | 70 mm | Under head |
| Strength Grade | 12.9 | High tensile |
| Head Type | 12-point flange | High torque capability |
| Torque Specification | 80 Nm + 90° angle | Yield point method |
| Surface Finish | Zinc‑nickel plating | Corrosion resistant |
| Weight | 0.08 kg | Complete |
| Warranty | 12 Months | Manufacturer Guarantee |
The 612630020214 connecting rod bolt is the product of advanced cold‑heading and precision thread‑rolling processes that preserve the material’s grain flow, significantly enhancing its fatigue strength. The micro‑alloyed steel composition, combined with a controlled heat‑treatment process, achieves a tensile strength of 1200 MPa while maintaining the ductility required to absorb the elastic deformation that occurs during torque-to-yield tightening. The threads are rolled, not cut, which eliminates stress risers and ensures that the bolt achieves the correct clamp load with every installation. The 12‑point flange head provides a large contact area, distributing clamping force evenly and reducing the risk of brinelling on the connecting rod cap. The zinc‑nickel plating provides outstanding corrosion protection, ensuring that the bolt can be removed easily during future service intervals. Each bolt is inspected for dimensional accuracy, hardness, and surface integrity, guaranteeing that the 612630020214 meets HOWO’s stringent quality standards. This meticulous engineering ensures that your connecting rods remain securely fastened, the bearings maintain their correct clearance, and your engine operates reliably under the most demanding conditions.
The 612630020214 connecting rod bolt is specifically designed for HOWO heavy‑duty trucks equipped with MC11 and MC13 engine families, including T7H, A7, and derivative models. It directly replaces the original bolt with identical thread size, length, and clamping characteristics, ensuring a straightforward installation without modifications. The bolt is compatible with all factory‑specified connecting rods and torque procedures, and it works seamlessly with the original equipment rod bearings. This connecting rod bolt is also compatible with many Sinotruk and other commercial vehicles that share the same engine architecture. To confirm fitment, always cross‑reference the OEM number on your existing bolt with 612630020214. If they match, this component will integrate seamlessly. Keeping these bolts in your spare parts inventory enables rapid engine overhauls, minimising downtime and preserving the performance and reliability of your engine.
HOWO T7H
Primary Fitment
HOWO A7
Also Compatible
MC11/MC13
Engine Series
Direct Replacement
No Modifications
Replacing worn, stretched, or damaged connecting rod bolts with the 612630020214 immediately restores the clamping integrity and safety of your engine’s rotating assembly. The precise torque retention and high tensile strength ensure that the connecting rod cap remains securely fastened, maintaining the correct bearing clearance and preventing catastrophic rod separation. The consistent clamp load also minimises the risk of bearing spin and crankshaft journal damage, extending the service life of both the bearings and the crankshaft. The corrosion‑resistant coating ensures that the bolts remain easy to remove during future service, reducing the risk of seized or broken bolts. For fleet operators, reliable connecting rod bolts reduce the risk of engine failures, lower maintenance costs, and help maintain the performance and efficiency of your vehicles. By investing in the 612630020214, you ensure that your HOWO engine delivers the power, reliability, and durability that professional drivers and fleet managers depend on.
Installing the 612630020214 connecting rod bolt is a critical procedure that requires precision and the correct tools. Begin by thoroughly cleaning the bolt holes in the connecting rod and the bolt threads, ensuring they are free of oil, debris, and old thread sealant. Apply a thin layer of assembly lubricant to the bolt threads and under‑head washer to ensure accurate torque readings. Carefully install the new bolts, tightening them in the correct sequence and in multiple stages to the manufacturer’s specified torque and angle. Use a calibrated torque wrench and angle gauge to achieve the final yield‑point torque. After installation, rotate the crankshaft to check for free movement and measure the bearing clearance to ensure it is within specifications. Periodically inspect the bolts for signs of corrosion or damage during routine maintenance. With proper installation, the 612630020214 will provide years of reliable clamping performance.
Pro Tip: When replacing connecting rod bolts, always replace all bolts as a set, even if only one is damaged. Using old bolts with new ones can lead to uneven clamp load and bearing failure. The 612630020214 is available individually; order the required quantity for a complete set to ensure consistent clamping force and engine integrity.
Genuine HOWO components are engineered to the highest standards, and the 612630020214 connecting rod bolt is no exception. Aftermarket bolts often use inferior steel, inconsistent heat treatment, or imprecise thread geometry, leading to incorrect clamp loads, premature stretching, or bolt failure. HOWO’s bolt is manufactured using the same materials and processes as the original equipment, guaranteeing a perfect fit and reliable performance. By choosing the 612630020214, you benefit from HOWO’s rigorous testing, including tensile strength, fatigue, and corrosion resistance tests. This ensures that the bolt meets the demanding requirements of heavy‑duty trucking. Moreover, genuine parts are backed by a comprehensive warranty and supported by HOWO’s global network, giving you confidence in your purchase.
OEM Authentic
Factory Quality
Long Service
Extended Life
Global Standard
Trusted Worldwide
Q: Which vehicles use the 612630020214 connecting rod bolt?
A: The 612630020214 is designed for HOWO T7H, A7, and other models with MC11/MC13 engines, as well as many Sinotruk trucks with the same engine architecture.
Q: What are the symptoms of a failed connecting rod bolt?
A: A knocking noise from the engine (especially under load), low oil pressure, metallic particles in the oil, and catastrophic rod cap failure are common indicators.
Q: Can I reuse the old connecting rod bolts?
A: No, connecting rod bolts are designed as single‑use fasteners. Once torqued to yield, they stretch and cannot reliably provide the correct clamp load. Always install new 612630020214 bolts when performing a rebuild.
Q: How do I verify the correct part?
A: Check the OEM number on your existing bolt. If it matches 612630020214, this is the exact replacement. Consult your vehicle’s parts manual for additional confirmation.
Order your 612630020214 Connecting Rod Bolt today! Explore our complete selection of genuine HOWO and Sinotruk engine components at Howo/Sitrak truck parts and keep your rotating assembly safely secured.
The 612630020214 Connecting Rod Bolt from HOWO is a testament to precision engineering and uncompromising quality. By choosing this genuine component, you ensure that your engine’s connecting rods are securely clamped, the bearings maintain their correct clearance, and your engine delivers the power, reliability, and durability required for modern heavy‑duty trucking. Whether you are a professional engine builder or a fleet manager, this connecting rod bolt offers the performance, reliability, and exact fit that you can count on. Trust HOWO – the benchmark for excellence in heavy‑duty truck components – and experience the difference that genuine quality makes.
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